Improvement in giffard s injectors



" UNITED STATES PATENT EETCE,

IMPROVEMENT IN GIFFARDS INJECTRS.

Spectiration 'ornlng part of Letters Patent No. 35,575, dated June l0, 186;.

To all whom tina/y concern.-

Be it known that I, JAMEs MILLnoLLANn, ot' Reading,`l3erks county, Pennsylvania, have invented an Improvement in Git'fards Injectors; and I do hereby declare the following to be a full, elear,and exact description of the same, reference being had to the accompanying drawings, and to "the letters of reference marked thereon.

My invention consists ot' a chamber with certain branches` in combination with an internal nozzle, the Awhole being constructed and arranged substantially as described hereinafter, solas to form aninjector of the most simple and'inexpensive character, compared with Y the elaborateand costly instruments known as of two parts-naniely, the metal easing inclos- Inga chamber, A, and having three projectting branches, "a, b c, and the nozzle B. Ihe

latter consists of a tubehaving throughout a "greater portion ot' its length a parallel bore, `but diminishing gradually in diameter with a gentle curve from the point to its termination y, where the diameter is one-third, or thereabout, of that of` the main body of the tube. The nozzle is screwed into the branch a., pro jects through the chamber A, and penetrates a short distance into the interior of the branch c, the extent of penetration being limited by the collar d of the nozzle. On the outer end,

c, ofthe latter are cut the threads of a screw adapted to the internal threads of an ordinary. cock, which, f being connected to the steampipe, serves to regulate the ilow` of steam through thenozzle. Asiniilar cock connected .to thewater-pipe is screwed onto the end of the branch b, and serves to regulate the admission of feed-water to the chamber A. The branch c is `connected directly to the boiler, or

to a cockl communicating therewith, as well as Witha pipe leading to the tender,.for a purpose alludedto hereinafter.

It will be observed that the interior of the branch c, where it is smallest in diameter, is somewhat less than the termination 'y of the nozzle, and that this' interior of the branch gradually increases in diameter as it approaches the chamber A with a gentleeurve, this curve being such in relation to the termi nation y of the nozzle that between the latter and the interior of the branch interven es a narrow annular space, fm, which gradually increases in size as it approaches the chamber A.

In making what is known as Giffards in` j ector77 the peculiar construction and arrangement of parts well known to engineers have hitherto been considered indispensable, as the result of a series of careful experiments, the plan illustrated in Fig. 2 having been generally adopted by the manufacturers both in this country and Europe. The adjustable perforated tube A, "the adjustable rod B, the nozzlc c, through which the steam and water passes, and the second nozzle, D, for 4receiving the jet of steam and water and directing it to the boiler are eommonto the injectors now in use. The accurate fitting of the parts composing these instruments, the number o1l tight packings required ,the elaborate patterns yand castings render them so expensive that there is little or no gain in adopting them in the place of ordinary feedpumps.

` After a series of practical tests I have discovered that the complex arrangement of parts constituting the Giffard injector and the elabcrate appliances for operating the same are unnecessary, and that the end attained by these costly instruments now in use maybe acquired by the device illustrated and `described, which may be constructed at a cost one-twentieth that of a Gii'fard injector. The flow of steam into the nozzle B is regulated by an ordinary cock, the tlow of water into the chamber A being .regulated bya similar cock, and the proper management ot' these two cocks is all that is required from the attendant en gineer.

In starting the injector in the firstinstancc the steam and water may be directed to the tender, (if the instrument be applied to a locomotive,) or may be otherwise disposed ot' by means,` of a cock attached to the branch c, and when the instrument is 'fairly in opera tion the plug of the cock may be turned, so as to direct the steam and water to the boiler.

I claim as my invention, and as an improved device for carrying out the principle described in the patent of Gifford of forcing` Water into herein set forth.

In testimony whereof I have signed my steam-boilers or for any other purpose to l name to this speciiication in the presence of which the instrument muy be epplicable l two subscribing Witnesses.

The chamber a,witl1 the brunch c,communil outing with the boiler, and branch b for the VitnesseS: water, in combination with the nozzle B for the Steam, the Whole being` formed and u-rl JAMES lVHLLHOLLAND.

DE B. Knuf, Trios. M. RICHARDS.

ranged substantially as and for the purpose 

